"Low Voltage" is not defined by the National Electrical Code and strictly speaking, optical fiber cable systems which transmit information using high-speed bursts of light generated by tiny lasers, are "no-voltage". Various terms for describing the different technologies are describing these diverse systems.
Articles covering low-voltage and power-limited devices, wiring, and systems are generally contained in Chapters 7 and 8 of the National Electrical Code. However, Chapters 4 and 5 of the NEC contains the requirements for:
Low-Voltage Lighting (Article 411)
Intrinsically Safe Systems (Article 504)
Sound Systems (Article 640)
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05LED - 2005 Low-Voltage and Power-Limited Systems DVD
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Course
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$149.00
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This full-color, illustrated textbook with corresponding DVD provides insight into many of the technical rules of the 2005 NEC that apply to these systems. Subjects include the NEC rules that apply to low-voltage and limited-energy systems that most . . .
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Test your knowledge of this subject with our FREE 25 question quiz
]
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05LEV - 2005 Low-Voltage and Power-Limited Systems Video
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Course
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$149.00
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This full-color, illustrated textbook with corresponding video provides insight into many of the technical rules of the 2005 NEC that apply to these systems. Subjects include the NEC rules that apply to low-voltage and limited-energy systems that mos . . .
[
Test your knowledge of this subject with our FREE 25 question quiz
]
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05LE - 2005 Low-Voltage and Power-Limited Systems Textbook
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Book
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$49.00
$29.40
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Subjects include the NEC rules that apply to low-voltage and limited-energy systems that most people are not aware of, definitions, the general NEC installation requirements, and specific NEC requirements for control, sound, video, CATV, CCTV, antenn . . .
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Test your knowledge of this subject with our FREE 25 question quiz
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